/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* Shared code for xpcshell and mochitests-chrome */

// const Cc, Ci, and Cr are defined in netwerk/test/httpserver/httpd.js so we
// need to define unique ones.
const AUS_Cc = Components.classes;
const AUS_Ci = Components.interfaces;
const AUS_Cr = Components.results;
const AUS_Cu = Components.utils;

const PREF_APP_UPDATE_AUTO                = "app.update.auto";
const PREF_APP_UPDATE_STAGE_ENABLED       = "app.update.staging.enabled";
const PREF_APP_UPDATE_BACKGROUNDERRORS    = "app.update.backgroundErrors";
const PREF_APP_UPDATE_BACKGROUNDMAXERRORS = "app.update.backgroundMaxErrors";
const PREF_APP_UPDATE_CERTS_BRANCH        = "app.update.certs.";
const PREF_APP_UPDATE_CERT_CHECKATTRS     = "app.update.cert.checkAttributes";
const PREF_APP_UPDATE_CERT_ERRORS         = "app.update.cert.errors";
const PREF_APP_UPDATE_CERT_MAXERRORS      = "app.update.cert.maxErrors";
const PREF_APP_UPDATE_CERT_REQUIREBUILTIN = "app.update.cert.requireBuiltIn";
const PREF_APP_UPDATE_CHANNEL             = "app.update.channel";
const PREF_APP_UPDATE_ENABLED             = "app.update.enabled";
const PREF_APP_UPDATE_IDLETIME            = "app.update.idletime";
const PREF_APP_UPDATE_LOG                 = "app.update.log";
const PREF_APP_UPDATE_NEVER_BRANCH        = "app.update.never.";
const PREF_APP_UPDATE_PROMPTWAITTIME      = "app.update.promptWaitTime";
const PREF_APP_UPDATE_SHOW_INSTALLED_UI   = "app.update.showInstalledUI";
const PREF_APP_UPDATE_SILENT              = "app.update.silent";
const PREF_APP_UPDATE_URL                 = "app.update.url";
const PREF_APP_UPDATE_URL_DETAILS         = "app.update.url.details";
const PREF_APP_UPDATE_URL_OVERRIDE        = "app.update.url.override";

const PREF_APP_UPDATE_CERT_INVALID_ATTR_NAME = PREF_APP_UPDATE_CERTS_BRANCH +
                                               "1.invalidName";

const PREF_APP_PARTNER_BRANCH             = "app.partner.";
const PREF_DISTRIBUTION_ID                = "distribution.id";
const PREF_DISTRIBUTION_VERSION           = "distribution.version";

const PREF_EXTENSIONS_UPDATE_URL          = "extensions.update.url";
const PREF_EXTENSIONS_STRICT_COMPAT       = "extensions.strictCompatibility";

const NS_APP_PROFILE_DIR_STARTUP   = "ProfDS";
const NS_APP_USER_PROFILE_50_DIR   = "ProfD";
const NS_GRE_DIR                   = "GreD";
const NS_XPCOM_CURRENT_PROCESS_DIR = "XCurProcD";
const XRE_UPDATE_ROOT_DIR          = "UpdRootD";

const CRC_ERROR   = 4;
const WRITE_ERROR = 7;

const FILE_BACKUP_LOG     = "backup-update.log";
const FILE_LAST_LOG       = "last-update.log";
const FILE_UPDATER_INI    = "updater.ini";
const FILE_UPDATES_DB     = "updates.xml";
const FILE_UPDATE_ACTIVE  = "active-update.xml";
const FILE_UPDATE_ARCHIVE = "update.mar";
const FILE_UPDATE_LOG     = "update.log";
const FILE_UPDATE_STATUS  = "update.status";
const FILE_UPDATE_VERSION = "update.version";

const MODE_RDONLY   = 0x01;
const MODE_WRONLY   = 0x02;
const MODE_CREATE   = 0x08;
const MODE_APPEND   = 0x10;
const MODE_TRUNCATE = 0x20;

const PR_RDWR        = 0x04;
const PR_CREATE_FILE = 0x08;
const PR_APPEND      = 0x10;
const PR_TRUNCATE    = 0x20;
const PR_SYNC        = 0x40;
const PR_EXCL        = 0x80;

const PERMS_FILE      = 0644;
const PERMS_DIRECTORY = 0755;

const DEFAULT_UPDATE_VERSION = "999999.0";

var gChannel;

#include sharedUpdateXML.js

AUS_Cu.import("resource://gre/modules/Services.jsm");
AUS_Cu.import("resource://gre/modules/XPCOMUtils.jsm");

const URI_UPDATES_PROPERTIES = "chrome://mozapps/locale/update/updates.properties";
const gUpdateBundle = Services.strings.createBundle(URI_UPDATES_PROPERTIES);

XPCOMUtils.defineLazyGetter(this, "gAUS", function test_gAUS() {
  return AUS_Cc["@mozilla.org/updates/update-service;1"].
         getService(AUS_Ci.nsIApplicationUpdateService).
         QueryInterface(AUS_Ci.nsITimerCallback).
         QueryInterface(AUS_Ci.nsIObserver).
         QueryInterface(AUS_Ci.nsIUpdateCheckListener);
});

XPCOMUtils.defineLazyServiceGetter(this, "gUpdateManager",
                                   "@mozilla.org/updates/update-manager;1",
                                   "nsIUpdateManager");

XPCOMUtils.defineLazyGetter(this, "gUpdateChecker", function test_gUC() {
  return AUS_Cc["@mozilla.org/updates/update-checker;1"].
         createInstance(AUS_Ci.nsIUpdateChecker);
});

XPCOMUtils.defineLazyGetter(this, "gUP", function test_gUP() {
  return AUS_Cc["@mozilla.org/updates/update-prompt;1"].
         createInstance(AUS_Ci.nsIUpdatePrompt);
});

XPCOMUtils.defineLazyGetter(this, "gDefaultPrefBranch", function test_gDPB() {
  return Services.prefs.getDefaultBranch(null);
});

XPCOMUtils.defineLazyGetter(this, "gPrefRoot", function test_gPR() {
  return Services.prefs.getBranch(null);
});

XPCOMUtils.defineLazyGetter(this, "gZipW", function test_gZipW() {
  return AUS_Cc["@mozilla.org/zipwriter;1"].
         createInstance(AUS_Ci.nsIZipWriter);
});

/* Initializes the update service stub */
function initUpdateServiceStub() {
  AUS_Cc["@mozilla.org/updates/update-service-stub;1"].
  createInstance(AUS_Ci.nsISupports);
}

/* Reloads the update metadata from disk */
function reloadUpdateManagerData() {
  gUpdateManager.QueryInterface(AUS_Ci.nsIObserver).
  observe(null, "um-reload-update-data", "");
}

/**
 * Sets the app.update.channel preference.
 *
 * @param  aChannel
 *         The update channel.
 */
function setUpdateChannel(aChannel) {
  gChannel = aChannel;
  debugDump("setting default pref " + PREF_APP_UPDATE_CHANNEL + " to " + gChannel);
  gDefaultPrefBranch.setCharPref(PREF_APP_UPDATE_CHANNEL, gChannel);
  gPrefRoot.addObserver(PREF_APP_UPDATE_CHANNEL, observer, false);
}

var observer = {
  observe: function(aSubject, aTopic, aData) {
    if (aTopic == "nsPref:changed" && aData == PREF_APP_UPDATE_CHANNEL) {
      var channel = gDefaultPrefBranch.getCharPref(PREF_APP_UPDATE_CHANNEL);
      if (channel != gChannel) {
        debugDump("Changing channel from " + channel + " to " + gChannel);
        gDefaultPrefBranch.setCharPref(PREF_APP_UPDATE_CHANNEL, gChannel);
      }
    }
  },
  QueryInterface: XPCOMUtils.generateQI([AUS_Ci.nsIObserver])
};

/**
 * Sets the app.update.url.override preference.
 *
 * @param  aURL
 *         The update url. If not specified 'URL_HOST + "update.xml"' will be
 *         used.
 */
function setUpdateURLOverride(aURL) {
  let url = aURL ? aURL : URL_HOST + "update.xml";
  debugDump("setting " + PREF_APP_UPDATE_URL_OVERRIDE + " to " + url);
  Services.prefs.setCharPref(PREF_APP_UPDATE_URL_OVERRIDE, url);
}

/**
 * Returns either the active or regular update database XML file.
 *
 * @param  isActiveUpdate
 *         If true this will return the active-update.xml otherwise it will
 *         return the updates.xml file.
 */
function getUpdatesXMLFile(aIsActiveUpdate) {
  var file = getUpdatesRootDir();
  file.append(aIsActiveUpdate ? FILE_UPDATE_ACTIVE : FILE_UPDATES_DB);
  return file;
}

/**
 * Writes the updates specified to either the active-update.xml or the
 * updates.xml.
 *
 * @param  aContent
 *         The updates represented as a string to write to the XML file.
 * @param  isActiveUpdate
 *         If true this will write to the active-update.xml otherwise it will
 *         write to the updates.xml file.
 */
function writeUpdatesToXMLFile(aContent, aIsActiveUpdate) {
  writeFile(getUpdatesXMLFile(aIsActiveUpdate), aContent);
}

/**
 * Writes the current update operation/state to a file in the patch
 * directory, indicating to the patching system that operations need
 * to be performed.
 *
 * @param  aStatus
 *         The status value to write.
 */
function writeStatusFile(aStatus) {
  var file = getUpdatesDir();
  file.append("0");
  file.append(FILE_UPDATE_STATUS);
  aStatus += "\n";
  writeFile(file, aStatus);
}

/**
 * Writes the current update version to a file in the patch directory,
 * indicating to the patching system the version of the update.
 *
 * @param  aVersion
 *         The version value to write.
 */
function writeVersionFile(aVersion) {
  var file = getUpdatesDir();
  file.append("0");
  file.append(FILE_UPDATE_VERSION);
  aVersion += "\n";
  writeFile(file, aVersion);
}

/**
 * Gets the updates root directory.
 *
 * @return nsIFile for the updates root directory.
 */
function getUpdatesRootDir() {
  try {
    return Services.dirsvc.get(XRE_UPDATE_ROOT_DIR, AUS_Ci.nsIFile);
  } catch (e) {
    // Fall back on the current process directory
    return getCurrentProcessDir();
  }
}

/**
 * Gets the updates directory.
 *
 * @return nsIFile for the updates directory.
 */
function getUpdatesDir() {
  var dir = getUpdatesRootDir();
  dir.append("updates");
  return dir;
}

/**
 * Writes text to a file. This will replace existing text if the file exists
 * and create the file if it doesn't exist.
 *
 * @param  aFile
 *         The file to write to. Will be created if it doesn't exist.
 * @param  aText
 *         The text to write to the file. If there is existing text it will be
 *         replaced.
 */
function writeFile(aFile, aText) {
  var fos = AUS_Cc["@mozilla.org/network/file-output-stream;1"].
            createInstance(AUS_Ci.nsIFileOutputStream);
  if (!aFile.exists())
    aFile.create(AUS_Ci.nsILocalFile.NORMAL_FILE_TYPE, PERMS_FILE);
  fos.init(aFile, MODE_WRONLY | MODE_CREATE | MODE_TRUNCATE, PERMS_FILE, 0);
  fos.write(aText, aText.length);
  fos.close();
}

/**
 * Reads the current update operation/state in a file in the patch
 * directory.
 *
 * @param  aFile (optional)
 *         nsIFile to read the update status from. If not provided the
 *         application's update status file will be used.
 * @return The status value.
 */
function readStatusFile(aFile) {
  var file;
  if (aFile) {
    file = aFile.clone();
    file.append(FILE_UPDATE_STATUS);
  }
  else {
    file = getUpdatesDir();
    file.append("0");
    file.append(FILE_UPDATE_STATUS);
  }
  return readFile(file).split("\n")[0];
}

/**
 * Reads text from a file and returns the string.
 *
 * @param  aFile
 *         The file to read from.
 * @return The string of text read from the file.
 */
function readFile(aFile) {
  var fis = AUS_Cc["@mozilla.org/network/file-input-stream;1"].
            createInstance(AUS_Ci.nsIFileInputStream);
  if (!aFile.exists())
    return null;
  fis.init(aFile, MODE_RDONLY, PERMS_FILE, 0);
  var sis = AUS_Cc["@mozilla.org/scriptableinputstream;1"].
            createInstance(AUS_Ci.nsIScriptableInputStream);
  sis.init(fis);
  var text = sis.read(sis.available());
  sis.close();
  return text;
}

/**
 * Reads the binary contents of a file and returns it as a string.
 *
 * @param  aFile
 *         The file to read from.
 * @return The contents of the file as a string.
 */
function readFileBytes(aFile) {
  var fis = AUS_Cc["@mozilla.org/network/file-input-stream;1"].
            createInstance(AUS_Ci.nsIFileInputStream);
  fis.init(aFile, -1, -1, false);
  var bis = AUS_Cc["@mozilla.org/binaryinputstream;1"].
            createInstance(AUS_Ci.nsIBinaryInputStream);
  bis.setInputStream(fis);
  var data = [];
  var count = fis.available();
  while (count > 0) {
    var bytes = bis.readByteArray(Math.min(65535, count));
    data.push(String.fromCharCode.apply(null, bytes));
    count -= bytes.length;
    if (bytes.length == 0)
      throw "Nothing read from input stream!";
  }
  data.join('');
  fis.close();
  return data.toString();
}

/* Returns human readable status text from the updates.properties bundle */
function getStatusText(aErrCode) {
  return getString("check_error-" + aErrCode);
}

/* Returns a string from the updates.properties bundle */
function getString(aName) {
  try {
    return gUpdateBundle.GetStringFromName(aName);
  }
  catch (e) {
  }
  return null;
}

/**
 * Gets the file extension for an nsIFile.
 *
 * @param  aFile
 *         The file to get the file extension for.
 * @return The file extension.
 */
function getFileExtension(aFile) {
  return Services.io.newFileURI(aFile).QueryInterface(AUS_Ci.nsIURL).
         fileExtension;
}

/**
 * Removes the updates.xml file, active-update.xml file, and all files and
 * sub-directories in the updates directory except for the "0" sub-directory.
 * This prevents some tests from failing due to files being left behind when the
 * tests are interrupted.
 */
function removeUpdateDirsAndFiles() {
  var file = getUpdatesXMLFile(true);
  try {
    if (file.exists())
      file.remove(false);
  }
  catch (e) {
    dump("Unable to remove file\npath: " + file.path +
         "\nException: " + e + "\n");
  }

  file = getUpdatesXMLFile(false);
  try {
    if (file.exists())
      file.remove(false);
  }
  catch (e) {
    dump("Unable to remove file\npath: " + file.path +
         "\nException: " + e + "\n");
  }

  // This fails sporadically on Mac OS X so wrap it in a try catch
  var updatesDir = getUpdatesDir();
  try {
    cleanUpdatesDir(updatesDir);
  }
  catch (e) {
    dump("Unable to remove files / directories from directory\npath: " +
         updatesDir.path + "\nException: " + e + "\n");
  }
}

/**
 * Removes all files and sub-directories in the updates directory except for
 * the "0" sub-directory.
 *
 * @param  aDir
 *         nsIFile for the directory to be deleted.
 */
function cleanUpdatesDir(aDir) {
  if (!aDir.exists())
    return;

  var dirEntries = aDir.directoryEntries;
  while (dirEntries.hasMoreElements()) {
    var entry = dirEntries.getNext().QueryInterface(AUS_Ci.nsIFile);

    if (entry.isDirectory()) {
      if (entry.leafName == "0" && entry.parent.leafName == "updates") {
        cleanUpdatesDir(entry);
        entry.permissions = PERMS_DIRECTORY;
      }
      else {
        try {
          entry.remove(true);
          return;
        }
        catch (e) {
        }
        cleanUpdatesDir(entry);
        entry.permissions = PERMS_DIRECTORY;
        entry.remove(true);
      }
    }
    else {
      entry.permissions = PERMS_FILE;
      entry.remove(false);
    }
  }
}

/**
 * Deletes a directory and its children. First it tries nsIFile::Remove(true).
 * If that fails it will fall back to recursing, setting the appropriate
 * permissions, and deleting the current entry.
 *
 * @param  aDir
 *         nsIFile for the directory to be deleted.
 */
function removeDirRecursive(aDir) {
  if (!aDir.exists())
    return;
  try {
    aDir.remove(true);
    return;
  }
  catch (e) {
  }

  var dirEntries = aDir.directoryEntries;
  while (dirEntries.hasMoreElements()) {
    var entry = dirEntries.getNext().QueryInterface(AUS_Ci.nsIFile);

    if (entry.isDirectory()) {
      removeDirRecursive(entry);
    }
    else {
      entry.permissions = PERMS_FILE;
      entry.remove(false);
    }
  }
  aDir.permissions = PERMS_DIRECTORY;
  aDir.remove(true);
}

/**
 * Returns the directory for the currently running process. This is used to
 * clean up after the tests and to locate the active-update.xml and updates.xml
 * files.
 *
 * @return nsIFile for the current process directory.
 */
function getCurrentProcessDir() {
  return Services.dirsvc.get(NS_XPCOM_CURRENT_PROCESS_DIR, AUS_Ci.nsIFile);
}

/**
 * Returns the Gecko Runtime Engine directory. This is used to locate the the
 * updater binary (Windows and Linux) or updater package (Mac OS X). For
 * XULRunner applications this is different than the currently running process
 * directory.
 *
 * @return nsIFile for the Gecko Runtime Engine directory.
 */
function getGREDir() {
  return Services.dirsvc.get(NS_GRE_DIR, AUS_Ci.nsIFile);
}

/**
 * Logs TEST-INFO messages.
 *
 * @param  aText
 *         The text to log.
 * @param  aCaller (optional)
 *         An optional Components.stack.caller. If not specified
 *         Components.stack.caller will be used.
 */
function logTestInfo(aText, aCaller) {
  let caller = (aCaller ? aCaller : Components.stack.caller);
  dump("TEST-INFO | " + caller.filename + " | [" + caller.name + " : " +
       caller.lineNumber + "] " + aText + "\n");
}

/**
 * Logs TEST-INFO messages when DEBUG_AUS_TEST evaluates to true.
 *
 * @param  aText
 *         The text to log.
 * @param  aCaller (optional)
 *         An optional Components.stack.caller. If not specified
 *         Components.stack.caller will be used.
 */
function debugDump(aText, aCaller) {
  if (DEBUG_AUS_TEST) {
    let caller = aCaller ? aCaller : Components.stack.caller;
    logTestInfo(aText, caller);
  }
}